1. Department of Internal Medicine, Faculty of Medicine, Justus Liebig University, Giessen, Germany.
2. Department of Biochemistry, Faculty of Medicine, Justus Liebig University, Giessen, Germany.
3. Department of Ecology (study group medical statistics), Faculty of Medicine, Justus Liebig University, Giessen, Germany.
4. Loewenstein Hospital, Medical Clinic I, Department of Pneumology, Loewenstein, Germany.
5. Institute for Transfusion Medicine Dessau, Red Cross Blood Transfusion Service NSTOB, Dessau, Germany.
6. Activaero GmbH, Gemuenden/Wohra, Germany.